Heat transfer in fluids, Comsol 4.0a

In summary, the conversation is about using Comsol Multiphysics to simulate an annealing furnace for warming aluminum ingots. The thermal conductivity of aluminum and the velocity of air are mentioned, and the question of the heat capacity in this scenario is asked. The formula for heat capacity and the time it would take to heat the ingot from 20 degrees Celsius to 609 degrees Celsius are also discussed.
  • #1
nuevatecha
1
0

Homework Statement


hi there,

I'm working on an annealing furnace. ingots are warmed up in the oven. I'm doing this with a finite elements method called Comsol Multiphysics. This is a pretty complex software program. Can someone please help me with this part of Comsol

Homework Equations



it is about an aluminum alloy warmed by air at a temperature of 610 degree's
alluminum has a thermal conductivity of 155 W/(m*K)

the density of air is not relevant in heat transfer (because of the reynolds number)

what is the heat capacity in this case? (velocity is 3.63 m/s)

how long will it take to heat the ingot from 20 degrees celcius to 609 degree's celsius?!
 
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  • #2
The heat capacity equation is c=Q/ΔT, where c is the heat capacity, Q is the energy transferred, and ΔT is the change in temperature. For the time it takes to heat the ingot, you will need to use the formula t = mC (T2 - T1) / Q, where m is the mass of the ingot, C is the heat capacity, T2 is the final temperature, T1 is the initial temperature, and Q is the rate of energy transfer.
 

Related to Heat transfer in fluids, Comsol 4.0a

1. What is heat transfer in fluids?

Heat transfer in fluids is the process by which thermal energy is transferred from a higher temperature region to a lower temperature region within a fluid. This can occur through conduction, convection, or radiation.

2. How does Comsol 4.0a handle heat transfer in fluids?

Comsol 4.0a is a software program that uses finite element analysis to solve heat transfer problems in fluids. It allows for the simulation of heat transfer in various types of fluids, including laminar and turbulent flows.

3. What is the difference between conduction and convection in heat transfer?

Conduction is the transfer of heat through a material, while convection is the transfer of heat through a fluid. Conduction relies on direct contact between the hot and cold regions, while convection involves the movement of the fluid to transport heat.

4. Can Comsol 4.0a be used for heat transfer analysis in different types of fluids?

Yes, Comsol 4.0a has the capability to simulate heat transfer in various types of fluids, such as gases, liquids, and multiphase mixtures. It also allows for the modeling of non-Newtonian fluids and phase change processes.

5. How accurate are the results obtained from heat transfer simulations in Comsol 4.0a?

The accuracy of the results obtained from Comsol 4.0a depends on various factors such as the quality of the input data, the complexity of the model, and the choice of numerical methods. Generally, Comsol has been shown to provide accurate results when compared to experimental data.

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